按热力管道系统形式来分,直接消耗一次热媒,中间设备少,但一次补充量大的是()系统。
A.闭式
B.开式
C.蒸汽
D.凝结水
参考答案:B
—Do you know Jim quarreled with his wife?
—I don’t know._____. [ ]
A. I don’t care also
B. So do I
C. Neither do I
D. too
VB中有两种类型字符串:变长字符串和定长字符串。以下是变长字符串的正确定义格式是()
A.dim a ass tring*2
B.dim b as string
C.b ass tring
D.dim b